"Results indicate that alcohol was present but it cannot be determined as yet if it played a role in her death," the family said in a written statement, citing test results provided to them by authorities.
The 27-year-old singer, beloved for her talent but infamous for erratic public behavior, arrests and drug problems, was found dead at her apartment in London on July 23. -[CNN]

you dopes, if she has say a benzodiazepine prescription, she could have thrown down ten pills and a gallon of vodka, and they could still rightfully claim that no illegal drugs were found in her system.